A5046605274- 2D Materials and Applications
- Particle accelerators and beam dynamics
- Molecular Junctions and Nanostructures
- Superconducting Materials and Applications
- Graphene research and applications
- Quantum and electron transport phenomena
- Gyrotron and Vacuum Electronics Research
- Advanced Photocatalysis Techniques
- Atomic and Subatomic Physics Research
- Seismic and Structural Analysis of Tall Buildings
- Ferroelectric and Negative Capacitance Devices
- Magnetic confinement fusion research
- Advanced Frequency and Time Standards
- Nanowire Synthesis and Applications
- Particle Accelerators and Free-Electron Lasers
- Plasmonic and Surface Plasmon Research
- Advanced Memory and Neural Computing
- Gas Sensing Nanomaterials and Sensors
- Luminescence and Fluorescent Materials
- Photoreceptor and optogenetics research
- Nuclear Physics and Applications
- Advanced Fiber Laser Technologies
- Catalytic Processes in Materials Science
ETH Zurich
2019-2023
The control of elastic and inelastic electron tunnelling relies on materials with well-defined interfaces. Two-dimensional van der Waals are an excellent platform for such studies. Signatures acoustic phonons defect states have been observed in current-to-voltage measurements. These features can be explained by direct electron-phonon or electron-defect interactions. Here we use a process that involves excitons transition metal dichalcogenides (TMDs). We study tunnel junctions consisting...
Transition metal dichalcogenides (TMDCs) exhibit high second harmonic (SH) generation in the visible due to their non-centrosymmetric crystal structure odd-layered form and direct bandgap transition when thinned down a monolayer. In order emit SH radiation into desired direction one requires means control phase of in-plane nonlinear polarization. Here, we couple response monolayer MoS$_{\text{2}}$ an optical phased array antenna demonstrate controllable steering emission. By exploiting...
The interest of nanoparticle-based aerogels—3-dimensional (3D) nanoparticle assemblies macroscopic sizes—in photocatalysis is mainly their versatility for tailoring properties.
Memristors hold great promise as building blocks for future computing architectures where memory and logic are combined at the hardware level. However, scaling down dimensions of memristive devices has been limited by high leakage currents, thus inhibiting further progress. Recent studies have demonstrated memristors with monolayers ${\mathrm{Mo}\mathrm{S}}_{2}$ large high-to-low resistance ratios. Defects metallic ion migrations often seen a possible explanation this behavior. A detailed...
Tunneling light-emitting devices (LEDs) based on transition metal dichalcogenides (TMDs) and other two-dimensional (2D) materials are a new platform for on-chip optoelectronic integration. Some of the physical processes underlying this LED architecture not fully understood, especially emission at photon energies higher than applied electrostatic potential, so-called overbias emission. Here we report potentials that near half optical bandgap energy in TMD-based tunneling LEDs. We show is...
Excitons in optoelectronic devices have been generated through optical excitation, external carrier injection, or employing pre-existing charges. Here, we reveal a new way to electrically generate excitons transition metal dichalcogenides (TMDs). The TMD is placed on top of gold-hBN-graphene tunnel junction, outside the tunneling pathway. This driven device features photoemission spectrum with distinct peak at exciton energy TMD. We interpret this observation as generation by transfer from...
Tunneling light-emitting devices (LEDs) based on transition metal dichalcogenides (TMDs) and other 2D materials are a new platform for on-chip optoelectronic integration. Some of the physical processes underlying this LED architecture not fully understood, especially emission at photon energies higher than applied electrostatic potential, so-called overbias emission. Here we report potentials that near half optical bandgap energy in TMD-based tunneling LEDs. We show is thermal nature, but...
The control of elastic and inelastic electron tunneling relies on materials with well defined interfaces. Van der Waals made two-dimensional constituents form an ideal platform for such studies. Signatures acoustic phonons defect states have been observed in current-to-voltage ($I-V$) measurements. These features can be explained by direct electron-phonon or electron-defect interactions. Here, we use a novel process that involves excitons transition metal dichalcogenides (TMDs). We study...
Linac4, CERN's new H⁻ injector Linac uses PI-Mode Structures (PIMS) for the energy range between 10³ and 160 MeV. 180 copper elements 12 PIMS cavities have been fabricated in a collaboration CERN, NCBJ FZJ from 2011 to 2016. The assembled, RF tuned validated at CERN. This paper reports on results as well experience with construction, installation, conditioning first operation beam.